Proper format for adding tenants.

The documentation tells you how to add a tenant but falls short of an actual example. (This drives me up a wall about the documentations.  One example would be really nice instead of hunting for WTF you are talking about.)

I'm trying to add a tenant. What is the proper format?  

When I try I keep getting this error:

An error occurred during this operation. For details, see the error description below.
  • One or more errors occurred. 'authority' should be in Uri format Parameter name: authority
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